Tentative to fix CI

- Create alias to python command
- Install emacs in workflow

.github/workflows/vfc_test_workflow.yml

@@ -21,6 +21,11 @@ jobs:
         with:
             fetch-depth: 0
 
+      - name: Install dependencies
+        run: |
+          alias python='python3'
+          apt -y install emacs
+
       - name: Run tests
         run: vfc_ci test -g -r
 
@@ -42,4 +47,4 @@ jobs:
         uses: actions/upload-artifact@v2
         with:
           name: ${{github.sha}}.vfcraw
-          path: ./*.vfcraw.h5
+          path: ./*.vfcraw.h5